<template>
    <el-form inline="true">
      <el-form-item label="创建日期">
        <el-date-picker v-model="datetimeRange" style="width: 240px" type="datetimerange" range-separator="至"
          start-placeholder="开始日期" end-placeholder="结束日期"></el-date-picker>
      </el-form-item>
      <el-form-item label="竞赛名称">
        <el-input v-model="params.title" placeholder="请您输入要搜索的竞赛名称" />
      </el-form-item>
      <el-form-item>
        <el-button @click="onSearch" plain>搜索</el-button>
        <el-button @click="onReset" plain type="info">重置</el-button>
        <el-button type="primary" :icon="Plus" plain @click="onAddExam">添加竞赛</el-button>
      </el-form-item>
    </el-form>
    <!-- 表格 -->
    <el-table height="526px" :data="examList">
      <el-table-column prop="title" label="竞赛标题"/>
      <el-table-column prop="startTime" width="180px" label="竞赛开始时间" />
      <el-table-column prop="endTime" width="180px" label="竞赛结束时间" />
      <el-table-column label="是否开赛" width="100px">
        <template #default="{ row }">
          <div v-if="!isNotStartExam(row)">
            <div v-if="!isNotEndExam(row)">
              <el-tag type="warning">已开赛</el-tag>
            </div>
            <div v-else-if="isNotEndExam(row)">
              <el-tag type="success">已完赛</el-tag>
            </div>
          </div>
          <div v-else>
            <el-tag type="info">未开赛</el-tag>
          </div>
        </template>
      </el-table-column>
      <el-table-column prop="status" width="100px" label="是否发布">
        <template #default="{ row }">
          <div v-if="row.status == 0">
            <el-tag type="danger">未发布</el-tag>
          </div>
          <div v-if="row.status == 1">
            <el-tag type="success">已发布</el-tag>
          </div>
        </template>
      </el-table-column>
      <el-table-column prop="createName" width="140px" label="创建用户" />
      <el-table-column prop="createTime" width="180px" label="创建时间" />
      <el-table-column label="操作" width="180px">
        <template #default="{ row }">
            <!--  -->
          <el-button v-if=" isNotStartExam(row) &&  row.status == 0" type="text" @click="onEdit(row.examId)">编辑
          </el-button>
          <el-button v-if="isNotStartExam(row) && row.status == 0" type="text" @click="onDelete(row.examId)" class="red">删除
          </el-button>
          <el-button v-if="row.status == 1 && isNotStartExam(row)" type="text"
            @click="cancelPublishExam(row.examId)">撤销发布</el-button>
          <el-button v-if="row.status == 0 && isNotStartExam(row)" type="text"
            @click="publishExam(row.examId)">发布</el-button>
          <el-button type="text" v-if="!isNotStartExam(row)">已开赛，不允许操作</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页区域 -->
    <el-pagination background size="small" layout="total, sizes, prev, pager, next, jumper" :total="total"
      v-model:current-page="params.pageNum" v-model:page-size="params.pageSize" :page-sizes="[1,5, 10, 15, 20]"
      @size-change="handleSizeChange" @current-change="handlePageChange" />
  </template>
  
  <script setup>
  import { Plus } from '@element-plus/icons-vue'
  import { getExamListService,delExamService,publishExamService,cancelPublishExamService  } from '@/apis/exam'
  import { reactive,ref } from 'vue'
  import router from '@/router';
  import { ElMessage } from 'element-plus';
  
  function isNotStartExam(exam) {
    const now = new Date(); //当前时间
    return new Date(exam.startTime) > now
  }

  function isNotEndExam(exam) {
    const now = new Date(); //当前时间
    console.log(now)
    console.log(new Date(exam.endTime))
    return new Date(exam.endTime) < now
  }
  
  const params = reactive({
    pageNum: 1,
    pageSize: 10,
    startTime:'',
    endTime:'',
    title: ''
  })
  
  const examList = ref([])
  const total = ref(0)
  const datetimeRange = ref([])
  

  function formatDate(date) {
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0'); // 月份从0开始，所以+1
    const day = String(date.getDate()).padStart(2, '0');
    const hours = String(date.getHours()).padStart(2, '0');
    const minutes = String(date.getMinutes()).padStart(2, '0');
    const seconds = String(date.getSeconds()).padStart(2, '0');
    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
  }

  // 当我们 首次访问这个页面时， 调用该方法获取竞赛列表，并填充到 响应式数据中
  async function getExamList() {

    // 这里对 date 进行类型转换
    if (datetimeRange.value[0] instanceof Date) {
      const startTime = formatDate(datetimeRange.value[0])

      // console.log(datetimeRange.value[0].toString())
      params.startTime =startTime
    }
    if (datetimeRange.value[1] instanceof Date) {
      params.endTime = formatDate(datetimeRange.value[1])
      // params.endTime = datetimeRange.value[1].toString()
    }


    console.log(params)

    const result = await getExamListService(params)
    
    examList.value = result.rows
    total.value = result.total
  }
  getExamList()



  // 添加竞赛
  function onAddExam(){
    router.push("/oj/system/examEdit?type=add")
  }

  // 编辑竞赛: 获取竞赛的基本信息 并 显示到界面中
  function onEdit(examId){
    // 跳转进 编辑页面
    router.push(`/oj/system/examEdit?type=edit&examId=${examId}`)
  }



  // 删除操作
  async function onDelete(examId){
    await delExamService(examId)
    ElMessage.success("删除成功")
    getExamList()
  }

  // 发布操作
  async function publishExam(examId){
    await publishExamService(examId)
    ElMessage.success("发布成功")
    getExamList()
  }

  // 撤销发布
  async function cancelPublishExam(examId) {
    await cancelPublishExamService(examId)
    ElMessage.success("撤销成功")
    getExamList()
  }

  

  // 搜索按钮
  function onSearch(){
    params.pageNum = 1
    getExamList()
  }
  // 重置按钮
  function onReset() {
    params.pageNum = 1
    params.pageSize = 10
    params.title = ''
    params.startTime = ''
    params.endTime = ''
    datetimeRange.value.length = 0
    getExamList()
  }

  
  function handleSizeChange(newSize){
    params.pageNum = 1
    getExamList()
  }

  function handlePageChange(){
    getExamList()
  }
  </script>